diff --git a/slsDetectorServers/mythen3DetectorServer/RegisterDefs.h b/slsDetectorServers/mythen3DetectorServer/RegisterDefs.h
index 4cd7ddc9f..847d396e6 100644
--- a/slsDetectorServers/mythen3DetectorServer/RegisterDefs.h
+++ b/slsDetectorServers/mythen3DetectorServer/RegisterDefs.h
@@ -132,7 +132,7 @@
 #define CONTROL_STP_ACQSTN_MSK          (0x00000001 << CONTROL_STP_ACQSTN_OFST)
 #define CONTROL_STRT_PATTERN_OFST       (2)
 #define CONTROL_STRT_PATTERN_MSK        (0x00000001 << CONTROL_STRT_PATTERN_OFST)
-#define CONTROL_STRT_READOUT_OFST       (3) // not connected in software yet
+#define CONTROL_STRT_READOUT_OFST       (3) 
 #define CONTROL_STRT_READOUT_MSK        (0x00000001 << CONTROL_STRT_READOUT_OFST)
 #define CONTROL_STRT_SW_TRIGGER_OFST    (4)
 #define CONTROL_STRT_SW_TRIGGER_MSK     (0x00000001 << CONTROL_STRT_SW_TRIGGER_OFST)
diff --git a/slsDetectorServers/mythen3DetectorServer/bin/mythen3DetectorServer_developer b/slsDetectorServers/mythen3DetectorServer/bin/mythen3DetectorServer_developer
index fedf3ee7f..7e66b07c4 100755
Binary files a/slsDetectorServers/mythen3DetectorServer/bin/mythen3DetectorServer_developer and b/slsDetectorServers/mythen3DetectorServer/bin/mythen3DetectorServer_developer differ
diff --git a/slsDetectorServers/mythen3DetectorServer/slsDetectorFunctionList.c b/slsDetectorServers/mythen3DetectorServer/slsDetectorFunctionList.c
index c2644a1eb..0e89c7811 100644
--- a/slsDetectorServers/mythen3DetectorServer/slsDetectorFunctionList.c
+++ b/slsDetectorServers/mythen3DetectorServer/slsDetectorFunctionList.c
@@ -2407,6 +2407,22 @@ int softwareTrigger() {
     return OK;
 }
 
+int startReadOut() {
+    LOG(logINFOBLUE, ("Starting Readout\n"));
+#ifdef VIRTUAL
+    // cannot set #frames and exptiem temporarily to 1 and 0,
+    // because have to set it back after readout (but this is non blocking)
+    return startStateMachine();
+#endif
+    cleanFifos();
+
+    // start readout
+    bus_w(CONTROL_REG, bus_r(CONTROL_REG) | CONTROL_STRT_READOUT_MSK);
+
+    LOG(logINFO, ("Status Register: %08x\n", bus_r(STATUS_REG)));
+    return OK;
+}
+
 enum runStatus getRunStatus() {
     LOG(logDEBUG1, ("Getting status\n"));
     // scan error or running
diff --git a/slsDetectorServers/slsDetectorServer/include/slsDetectorFunctionList.h b/slsDetectorServers/slsDetectorServer/include/slsDetectorFunctionList.h
index e2b0b3b67..c63064d9f 100644
--- a/slsDetectorServers/slsDetectorServer/include/slsDetectorFunctionList.h
+++ b/slsDetectorServers/slsDetectorServer/include/slsDetectorFunctionList.h
@@ -567,8 +567,7 @@ int stopStateMachine();
 #if defined(EIGERD) || defined(MYTHEN3D)
 int softwareTrigger();
 #endif
-
-#ifdef EIGERD
+#if defined(EIGERD) || defined(MYTHEN3D)
 int startReadOut();
 #endif
 enum runStatus getRunStatus();
diff --git a/slsDetectorServers/slsDetectorServer/include/slsDetectorServer_funcs.h b/slsDetectorServers/slsDetectorServer/include/slsDetectorServer_funcs.h
index 9bccf5a23..a445323ee 100644
--- a/slsDetectorServers/slsDetectorServer/include/slsDetectorServer_funcs.h
+++ b/slsDetectorServers/slsDetectorServer/include/slsDetectorServer_funcs.h
@@ -239,4 +239,5 @@ int get_bad_channels(int);
 int set_bad_channels(int);
 int reconfigure_udp(int);
 int validate_udp_configuration(int);
-int get_bursts_left(int);
\ No newline at end of file
+int get_bursts_left(int);
+int start_readout(int);
\ No newline at end of file
diff --git a/slsDetectorServers/slsDetectorServer/src/slsDetectorServer_funcs.c b/slsDetectorServers/slsDetectorServer/src/slsDetectorServer_funcs.c
index 436084fa1..3a39ad220 100644
--- a/slsDetectorServers/slsDetectorServer/src/slsDetectorServer_funcs.c
+++ b/slsDetectorServers/slsDetectorServer/src/slsDetectorServer_funcs.c
@@ -358,6 +358,7 @@ void function_table() {
     flist[F_RECONFIGURE_UDP] = &reconfigure_udp;
     flist[F_VALIDATE_UDP_CONFIG] = &validate_udp_configuration;
     flist[F_GET_BURSTS_LEFT] = &get_bursts_left;
+    flist[F_START_READOUT] = &start_readout;
 
     // check
     if (NUM_DET_FUNCTIONS >= RECEIVER_ENUM_START) {
@@ -8103,4 +8104,44 @@ int get_bursts_left(int file_des) {
     LOG(logDEBUG1, ("retval num bursts left %lld\n", (long long int)retval));
 #endif
     return Server_SendResult(file_des, INT64, &retval, sizeof(retval));
-}
\ No newline at end of file
+}
+
+int start_readout(int file_des) {
+    ret = OK;
+    memset(mess, 0, sizeof(mess));
+#ifndef MYTHEN3D
+    functionNotImplemented();
+#else
+    if (Server_VerifyLock() == OK) {
+        enum runStatus s = getRunStatus();
+        if (s == RUNNING || s == WAITING) {
+            ret = FAIL;
+            strcpy(mess, "Could not start readout because the detector is "
+                         "already running!\n");
+            LOG(logERROR, (mess));
+        } else if (configured == FAIL) {
+            ret = FAIL;
+            strcpy(mess, "Could not start readout because ");
+            strcat(mess, configureMessage);
+            LOG(logERROR, (mess));
+        } else {
+            memset(scanErrMessage, 0, MAX_STR_LENGTH);
+            sharedMemory_setScanStop(0);
+            sharedMemory_setScanStatus(IDLE); // if it was error
+            // start readout
+            ret = startReadOut();
+            if (ret == FAIL) {
+#ifdef VIRTUAL
+                sprintf(mess,
+                        "Could not start readout. Could not create udp "
+                        "socket in server. Check udp_dstip & udp_dstport.\n");
+#else
+                sprintf(mess, "Could not start readout\n");
+#endif
+                LOG(logERROR, (mess));
+            }
+        }
+    }
+#endif
+    return Server_SendResult(file_des, INT32, NULL, 0);
+}
diff --git a/slsDetectorSoftware/include/Detector.h b/slsDetectorSoftware/include/Detector.h
index b91bc058e..0947733d2 100644
--- a/slsDetectorSoftware/include/Detector.h
+++ b/slsDetectorSoftware/include/Detector.h
@@ -456,6 +456,11 @@ class Detector {
      * WAITING and automatically returns to idle at the end of acquisition. */
     void startDetector();
 
+    /** [Mythen3] Non blocking: start detector readout of counters in chip.
+     * Status changes to TRANSMITTING and automatically returns to idle at the
+     * end of readout. */
+    void startDetectorReadout();
+
     /** Non blocking: Abort detector acquisition. Status changes to IDLE or
      * STOPPED. Goes to stop server. */
     void stopDetector();
diff --git a/slsDetectorSoftware/src/CmdProxy.h b/slsDetectorSoftware/src/CmdProxy.h
index daaf7588f..4df0a4c98 100644
--- a/slsDetectorSoftware/src/CmdProxy.h
+++ b/slsDetectorSoftware/src/CmdProxy.h
@@ -835,6 +835,7 @@ class CmdProxy {
         {"rx_start", &CmdProxy::rx_start},
         {"rx_stop", &CmdProxy::rx_stop},
         {"start", &CmdProxy::start},
+        {"readout", &CmdProxy::readout},
         {"stop", &CmdProxy::stop},
         {"rx_status", &CmdProxy::ReceiverStatus},
         {"status", &CmdProxy::DetectorStatus},
@@ -1429,7 +1430,14 @@ class CmdProxy {
     EXECUTE_SET_COMMAND_NOID(
         start, startDetector,
         "\n\tStarts detector acquisition. Status changes to RUNNING or WAITING "
-        "and automatically returns to idle at the end of acquisition.");
+        "and automatically returns to idle at the end of acquisition. If the "
+        "acquisition was abruptly stopped, some detectors come back to "
+        "STOPPED.");
+
+    EXECUTE_SET_COMMAND_NOID(
+        readout, startDetectorReadout,
+        "\n\t[Mythen3] Starts detector readout. Status changes to TRANSMITTING "
+        "and automatically returns to idle at the end of readout.");
 
     EXECUTE_SET_COMMAND_NOID(stop, stopDetector,
                              "\n\tAbort detector acquisition. Status changes "
diff --git a/slsDetectorSoftware/src/Detector.cpp b/slsDetectorSoftware/src/Detector.cpp
index 296293cd4..2186531b2 100644
--- a/slsDetectorSoftware/src/Detector.cpp
+++ b/slsDetectorSoftware/src/Detector.cpp
@@ -593,6 +593,10 @@ void Detector::startDetector() {
     pimpl->Parallel(&Module::startAcquisition, {});
 }
 
+void Detector::startDetectorReadout() {
+    pimpl->Parallel(&Module::startReadout, {});
+}
+
 void Detector::stopDetector() { pimpl->Parallel(&Module::stopAcquisition, {}); }
 
 Result<defs::runStatus> Detector::getDetectorStatus(Positions pos) const {
diff --git a/slsDetectorSoftware/src/Module.cpp b/slsDetectorSoftware/src/Module.cpp
index 82bc848fb..a856fe145 100644
--- a/slsDetectorSoftware/src/Module.cpp
+++ b/slsDetectorSoftware/src/Module.cpp
@@ -407,6 +407,11 @@ void Module::startAcquisition() {
     sendToDetector(F_START_ACQUISITION);
 }
 
+void Module::startReadout() {
+    shm()->stoppedFlag = false;
+    sendToDetector(F_START_READOUT);
+}
+
 void Module::stopAcquisition() {
     // get status before stopping acquisition
     runStatus s = ERROR, r = ERROR;
diff --git a/slsDetectorSoftware/src/Module.h b/slsDetectorSoftware/src/Module.h
index 2d8ae07af..f9f808750 100644
--- a/slsDetectorSoftware/src/Module.h
+++ b/slsDetectorSoftware/src/Module.h
@@ -160,6 +160,7 @@ class Module : public virtual slsDetectorDefs {
     void startReceiver();
     void stopReceiver();
     void startAcquisition();
+    void startReadout();
     void stopAcquisition();
     void restreamStopFromReceiver();
     void startAndReadAll();
diff --git a/slsDetectorSoftware/tests/test-CmdProxy-mythen3.cpp b/slsDetectorSoftware/tests/test-CmdProxy-mythen3.cpp
index 8f10e628d..e63417664 100644
--- a/slsDetectorSoftware/tests/test-CmdProxy-mythen3.cpp
+++ b/slsDetectorSoftware/tests/test-CmdProxy-mythen3.cpp
@@ -115,6 +115,23 @@ TEST_CASE("Setting and reading back MYTHEN3 dacs", "[.cmd][.dacs][.new]") {
     }
 }
 
+/* acquisition */
+
+TEST_CASE("readout", "[.cmd][.new]") {
+    Detector det;
+    CmdProxy proxy(&det);
+    // PUT only command
+    REQUIRE_THROWS(proxy.Call("readout", {}, -1, GET));
+    auto det_type = det.getDetectorType().squash();
+    if (det_type != defs::MYTHEN3) {
+        REQUIRE_THROWS(proxy.Call("readout", {}, -1, GET));
+    } else {
+        std::ostringstream oss;
+        proxy.Call("readout", {}, -1, PUT, oss);
+        REQUIRE(oss.str() == "readout successful\n");
+    }
+}
+
 /* Mythen3 Specific */
 
 TEST_CASE("counters", "[.cmd][.new]") {
diff --git a/slsSupportLib/include/sls_detector_funcs.h b/slsSupportLib/include/sls_detector_funcs.h
index 3d38dccf1..bda81ab11 100755
--- a/slsSupportLib/include/sls_detector_funcs.h
+++ b/slsSupportLib/include/sls_detector_funcs.h
@@ -214,6 +214,7 @@ enum detFuncs {
     F_RECONFIGURE_UDP,
     F_VALIDATE_UDP_CONFIG,
     F_GET_BURSTS_LEFT,
+    F_START_READOUT,
 
     NUM_DET_FUNCTIONS,
     RECEIVER_ENUM_START = 256, /**< detector function should not exceed this
@@ -533,6 +534,7 @@ const char* getFunctionNameFromEnum(enum detFuncs func) {
     case F_RECONFIGURE_UDP:                 return "F_RECONFIGURE_UDP";                           
     case F_VALIDATE_UDP_CONFIG:             return "F_VALIDATE_UDP_CONFIG";                               
     case F_GET_BURSTS_LEFT:                 return "F_GET_BURSTS_LEFT";
+    case F_START_READOUT:                   return "F_START_READOUT";
     
     case NUM_DET_FUNCTIONS:              	return "NUM_DET_FUNCTIONS";
     case RECEIVER_ENUM_START:				return "RECEIVER_ENUM_START";
diff --git a/slsSupportLib/include/versionAPI.h b/slsSupportLib/include/versionAPI.h
index ced7db62a..ed09b5851 100644
--- a/slsSupportLib/include/versionAPI.h
+++ b/slsSupportLib/include/versionAPI.h
@@ -9,4 +9,4 @@
 #define APIGOTTHARD2 0x201016
 #define APIJUNGFRAU 0x201016
 #define APIMOENCH 0x201013
-#define APIMYTHEN3 0x201020
+#define APIMYTHEN3 0x201026